Fetch and deliver mail 1.3

Fetch and deliver mail is a simple, lightweight replacement for mail fetching, filtering, and delivery programs such as fetchmail and procmail.
It can fetch using POP3, POP3S, IMAP, IMAPS, or stdin, and deliver to a pipe, file, maildir, mbox, or SMTP server, based on a set of regexps.
Fetch and deliver mail can be used for both single user and multiuser setups, and is designed with privilege separation when running as root.
Enhancements:
- Mostly configuration file enhancements and code cleanup were done since 1.2. ifdef/endif blocks and inline shell commands are allowed in the configuration file.
- A built-in string cache using TDB was added.
- Some extra default tags were added. NNTPS fetching was implemented.